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LOG OF EXPLORATORY BORING <br /> PROJECT NUMBER 20805-147.004 BORING NO. B-9/MW4 <br /> l� PROJECT NAME ARCO 2186 PAGE 1 OF 4 <br /> BY IM Capps DATE 10/30/97 SURFACE ELEV. 14.5 ft. <br /> FID BLow Recovery WELL <br /> Readings Counts MEEL- -LJU GRAPHIC DESCRIPTION DETAIL <br /> Or t� CL <br /> i� COLUMN <br /> (ppm) (bLw/ft) (ft/ft) 0 _j t" j � <br /> ASPHALT <br /> FILL; base rock <br /> SILT(ML); very dark grayish brown (10YR, 3/2); <br /> 100% low plasticity fines; trace fine sand; damp; :t <br /> no odor. t <br /> SILT (ML);yellowish brown (10YR 5/6); 85% low <br /> 5 plasticity fines; 5% fine sand; 10% gravel; damp; <br /> 0.0 90/10" 1.011.5 no odor. <br /> @ 5 ft: no gravel; 95% low plasticity fines; 5% ; <br /> fine sand; iron oxide mottling over 15% of } <br /> sample; damp; hard; no odor. <br /> @ 8 ft: color change to dark yellowish brown <br /> (10YR, 4/4) <br /> .41 <br /> 4. <br /> 0.0 55 1.2/1.5 10 @ 10 ft: 100% low plasticity fines; trace fine <br /> sand; no iron oxide staining; damp; hard. <br /> 0.0 28 1.2/1.5 15 @ 15 ft: 95% low plasticity fines; 5% fine sand; <br /> iron oxide mottling over 15 to 20%; damp; very <br /> stiff; no odor. <br /> 20 <br /> REMARKS <br /> • Boring drilled using 10-inch-diameter, hollow-stem auger drilling equipment and sampled with a modified California <br /> split-spoon sampler. Boring converted to a 4-inch diameter monitoring well. See Well Details sheet for well <br /> consttucdon information. <br /> E ON <br />